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Hot Glue Gun: Weller & Brassaw, 1973
Carl E. Weller and Alden J. Brassaw, for Cooper Industries, patented this glue gun in 1973, US 3,744,921. A stick of solid hot-melt adhesive drops through a loading well into a tubular melt chamber that narrows to a nozzle. Mica sheet wound with nichrome wire and closed by a metal sleeve heats the chamber, under a thermostat. Instead of a thumb, ratchet or feed wheel pushing the stick, a spring drives a Teflon-tipped piston forward against it. A valve pin in the nozzle keeps it closed against dripping; pressing the projecting pin on the work opens it and the glue flows.
高级
Factory process
说明
1
1
Housing and melt chamber
Housing and melt chamber
Fit the elongated tubular melt chamber between the two pistol-shaped housing halves: a uniform cylindrical barrel with a loading well opening through the top of the housing, a converging conical forward part and a threaded end.
此步骤所需材料：
热熔胶枪外壳半壳1 个
管状熔胶腔1 个所需工具：
螺丝刀套装2
2
Heater
Heater
Wrap mica sheeting spirally round the barrel with nichrome windings between the layers, close it in a tubular metal sleeve, and fit the thermostat in its well against it.
此步骤所需材料：
云母绕制带温控器的镍铬加热器1 个
镍铬丝1 as required
云母片1 as required所需工具：
钢丝钳3
3
Nozzle and valve
Nozzle and valve
Screw the nozzle onto the threaded end. Inside it, the valve pin's enlarged portion seats against the bore's step and its tip projects from the outlet; glue pressure holds it shut until the tip is pressed against the work.
此步骤所需材料：
带阀胶嘴1 个所需工具：
活动扳手4
4
Plunger
Plunger
Fit the plunger, a Teflon piston on a rod guided by a plate, behind the loading well, with its knob outside the housing; couple it to the spring in its tube through the pull device so the spring pushes the glue stick forward.
此步骤所需材料：
带 Teflon 活塞的弹簧推杆1 个所需工具：
螺丝刀套装材料
7- 1 个占位符
- 1 个占位符
- 占位符
- 1 as required占位符
- 1 as required占位符
- 1 个占位符
- 占位符
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